The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 20, 2016
Filed:
Jul. 30, 2014
Avago Technologies General Ip (Singapore) Pte. Ltd, Singapore OT, SG;
Adam Weiner, Milpitas, CA (US);
James A Rizzo, Austin, TX (US);
Mark Ish, Norcross, GA (US);
Robert L Sheffield, Boulder, CO (US);
Horia Cristian Simionescu, Milpitas, CA (US);
Avago Technologies General IP (Singapore) Pte. Ltd., Singapore, SG;
Abstract
Methods and structure for host-side device drivers for Redundant Array of Independent Disks (RAID) systems. One system includes a processor and memory of a host, which implement a device driver. The device driver receives an Input/Output (I/O) request from an Operating System (OS) of the host, translates Logical Block Addresses (LBAs) from the received request into physical addresses at multiple storage devices, generates child I/O requests directed to the physical addresses based on the received request, and accesses an address lock system at a RAID controller to determine whether the physical addresses are accessible. If the physical addresses are accessible, the device driver reserves the physical addresses by updating the address lock system, and directs the child I/O requests to a hardware path at the RAID controller for handling single-strip I/O requests. If the physical addresses are not accessible, the device driver delays processing of the child I/O requests.